#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
int main()
{
	int n = 0;
	scanf("%d", &n);
	int a = 0;
	int sum = 0;
	for (int i = 0; i < 5; i++)
	{
		a = a * 10 + n;
		sum = sum + a;
	}
	printf("%d", sum);
	return 0;
}